Dressing, grinding and polishing tool for doffer rolls of carding machines



N 1965 D 1 RILEY 3,214,868

DRESSING, GRINDIN'G'AND POLISHING TOOL FOR DOFFER ROLLS OF GARDING MACHINES Filed July 24, 1963 2 Sheets-Sheet 1 j g- .1 a s H l! 2 43 42 g 80 4; g g

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;; ag/W Nov. 2, 1965 D. l. RILEY DRESSING, GRINDIN G AND POLIISHING' TOOL FOR DOFFER ROLLS OF CARDING MACHINES 2 Sheets-Sheet 2 Filed July 24, 1963 INVENTOR DALE LRILEY United States Patent 3,214,868 DRESSENG, GRENDING AND POLISHING TGOL FOR DGFFLIR R'SLLS 0F CARDING MAGHINES Dale I. Riley, 3337 N. Richards St., Milwaukee, Wis. Filed July 24, 1963, Sci. No. 297,299 Claims. (1. 5117i This invention appertains to grinding and polishing machines, and more particularly to new and useful improvements in a dressing, grinding and polishing tool for doffer rolls and the like in carding machines.

Carding machines are utilized to comb or card raw cotton, wool, jute etc. with the object in view of straightening and inter-weaving the fibers. Various cylinders or rolls are used, and many are type referred to as dotfer rolls. These rolls consist of a cylindrical roll having a plurality of rows of hook-shaped teeth or points formed in a helical fashion. While I have illustrated in the drawings, a roll in which the teeth or points, appear integral therewith, the rows are actually, in most instances, formed from a cast iron cylinder, the outside surface of which is turned in a lathe, sometimes with a slight crown toward the middle of the roll, next a grooving tool is utilized to cut a helical groove to the proper depth in which wire carrying the teeth or points is tightly wound, and the groove and ridge between the grooves is spread and pressed down, to insure a tight fit between the wire and groove.

It is necessary in such machines that the teeth or points on the roll work at close tolerances with the teeth or points of an adjacent roll or rolls, so that the raw material can be properly combed or carded. Due to continual wear and use, the depth of the grooves can change or vary. Further, the teeth or points themselves often become worn and vary in height, the teeth also tend to bend and otherwise get out of alignment. In the past it has been most difficult to properly dress, grind and polish the teeth and properly align and adjust the space between the rows of teeth.

Therefore, a primary object of my present invention is to provide a portable tool or machine which can be associated with a doffer roll or the like, and which is provided with fine adjustments so that the machine can be utilized to grind all sides of the teeth or points of the roll, and to grind the bent or hooked points that may extend into the space between the rows of teeth or protrude above the diametrical surface of the roll and which may also be utilized to polish the teeth or points to a high polish.

Another object of my present invention is to provide a portable grinding and polishing machine or tool having guide members positioned in the space between the teeth or points, to thus assure the proper guiding and positioning of the tool while it is performing the operation of grinding and/ or polishing, as the roll is rotated and the teeth or points worked upon.

A further object of my present invention is to provide a novel portable machine in which the spacing between the guides may be initially adjusted so that the machine may be utilized with any type of roll regardless of the spacing and distance between the rows of teeth.

Still another object of my present invention is to provide a portable tool of the above character wherein the height of the grinding or polishing tools in relation to the guides can be adjusted to accommodate all variations in the depths of grooves or heights of the teeth or points.

An important object of my present invention is to provide a final, fine lateral adjustment between the guides and working tool members, so that a tool (a grinding wheel for example), after preferred adjustment for height, can be moved laterally or transversely, to alternately engage opposite sides of adjacent rows of teeth or points of any particular groove.

A salient object of my present invention resides in providing a new and novel portable tool or machine for the dressing, grinding and polishing of a doffer roll and the like, having a horizontally, transversely extending power drive shaft to either end of which a grinding and/ or polishing or dressing member may be attached, with the power shaft being adjustably supported in relation to guide mem- 'bers and the adjustment being provided as to height and as to lateral movements to enable the tool to dress, grind and/or polish all types of carding machine doifer rolls regardless of their size and dimension.

A further object of my invention is to provide a simple, practical and reliable construction that is economical to manufacture, easy to assemble and positive in its operation.

With the above and other objects in view, which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination and arrangement of parts, hereinafter more fully described, illustrated and claimed.

A preferred and practical embodiment of my invention is shown in the accompanying drawing, in which FIGURE 1 is a front elevational view of my novel grinding and polishing tool shown in its working position for grinding the groove and/or sides of the teeth and points of a dofler roll, certain parts being broken away and in section, to illustrate details in its construction;

FIGURE 2 is a fragmentary vertical longitudinal section, taken on the line 22 of FIGURE 1 of the drawings, and looking in the direction of the arrows;

FIGURE 3 is a fragmentary, transverse vertical section taken on the line 33 of FIGURE 4 of the drawings, looking in the direction of the arrows and illustrating details in the fine adjustment for laterally moving the work member in relation to the guides;

FIGURE 4 is a horizontal section taken on the line 4-4 of FIGURE 1 of the drawings, looking in the direction of the arrows;

FIGURE 5 is a vertical, longitudinal section taken on the line 55 of FIGURE 1 of the drawings and looking in the direction of the arrows, and

FIGURE 6 is a fragmentary horizontal section taken on the line 6-6 of FIGURE 3 of the drawings and illustrating details in the construction of the bracket supporting the memper utilized for the fine lateral adjustment between the guides and working tools of the machine.

Referring now to the drawings in detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter G generally indicates one type of my improved grinding and polishing tool or machine, and the same includes broadly a supporting frame 10, comprising an upright tubular post 11, lower supporting frame 12, carrying the rotating power shaft 13 and motor 14, and an adjustable supporting bar 15 received in the tubular post 11 and to the lower end of which is secured the transversely extending guide plate 16.

The supporting frame 10 and tubular post 11 have secured thereto spaced parallel upper and lower transversely extending beams 17 and 18, and these beams are firmly secured to the post 11 by means of the set screws 19 which project into the respective central apertures 20 formed in each beam and through which the post 11 is received. The beams are further strengthened and connected at their end terminations by vertically extending parallel uprights 21 and 22, and these uprights together with the beams form part of the sturdy rectangular shaped lower supporting frame 12, which is positioned, as shown, adjacent the lower end of the 3 tubular post 11. The uprights 21 and 22 can be of any desired construction but in the preferred form, they each include a rigid inner bar 23 and a loosely mounted outer sleeve 24. These outer sleeves 24 provide support for holding and guiding the machine when the same is supported and operated manually.

The lower beam 18 of the frame 12 has formed thereon forwardly projecting reduced sections 25 and 26 adjacent the sides of the post 11. The outer casing 14 of the motor 14 includes rearwardly projecting companion brackets 27 and 28, respectively, and each bracket is provided with a deep groove 29. These grooves 23 receive the respective reduced sections 25 and 26 and thus, the motor 14 is firmly carried against up and down movement with respect to the beam 18, but can be moved transversely or laterally in respect thereto. To allow for this movement, but to also prevent forward or rearward movement, I provide transversely extending slots 30 in the reduced sections 25 and 26, and in each lower leg 31 of the brackets 27 and 28, I provide an upwardly projecting stop pin 32.

As previously mentioned, firmly secured to the lower end of the supporting bar 15 is the transversely extending guide plate 16 and to further stabilize this plate, I provide a pair of upright guide posts 33, which are slidably received in suitable apertures 34 formed in the beam 1?. This guide plate has secured to its outer ends depending guides 35 and 36 respectively, and in the preferred construction, each guide is formed integral with a base member 36 and is secured by means of the Allen head screws 37, 37, as shown. In order to give a fine adjustment and proper spacing of the parallel guides 35 and 36, one of the guides 36 can be adjusted transversely by providing a pair of slots 38 in the end 39 of the guide plate 16, and through which the screws 37 extend.

It is to be noted that the upper end 40 of the supporting bar 15 is threaded and its extreme upper end is provided with a handle 41. Briefly, the inner bore of the tubular post 11 is smooth and attached to the upper end thereof is a rotatable cap 42 having an internally threaded central aperture 43 which mates with the threads 40 of the supporting bar. To facilitate the rotation 'of the cap 42 but to keep the cap from moving up or down in relation to the tube 11 I provide a peripheral groove 42' adjacent the upper end termination of the tube 11. The cap is provided with a pair or set of guide screws 80 and these screws or guides ride in the groove 4.2 and therefore it is obvious that the cap 42 may be rotated but still held against movement off the end of the tubular post 11.

From the description so far, it should be readily apparent to those skilled in the art that the distance between the guide plate 16 and its guides 35 and 36, and the beam 18 can be adjusted by merely turning the cap 42 since the lower end 60 of the bar 15 is held against rotation by being firmly secured to the guide plate 16. Thus, variations in height between the guides and any tool secured to the shaft 13 can be initially adjusted. It is also evident that within the limits of the grooves 30 and stop pins 32, the brackets 27 and 28 can be moved laterally in relation to the beam 18 and as the description proceeds it will be apparent that this lateral adjustment is extremely important. To bring about this fine lateral adjustment, I provide an arbor member 44 into which is milled an upwardly and angularly extending cam slot 45. The arbor 44 is carried by a threaded post 46 which extends through the upper beam 17 and an adjusting nut 47. The adjusting nut may be rotated and is held in a horizontally formed groove 48 formed in the forward side 49 of the beam 17. To further hold the arbor 44 to the frame 12 and post 11 I provide a bracket 50 which is secured to the post 11 by a set screw or the like 51. This bracket 50 has formed integral therewith a laterally extending arm 52 in the forward face of which is formed a vertically extending open slot 53. While the arbor 44 and slot 53 could be of any desired configuration the arbor is preferably formed with an upstanding rectangular shaped projection 54 and the slot 53 is correspondingly formed to slidably receive the projection, as shown. Over the open end of the slot 53 I provide a closure plate 55 and this plate is resiliently held in contact with the side 56 of the arm 52, by means of the threaded bolts 57 and springs 58 held between the heads 59 and plate 55. Thus, the plate 55 can give, and the projection 54 of the arbor 44 will not tend to bind in the slot. Further, the plate can easily be removed to replace or adjust the arbor.

Secured to the lower beam 18 adjacent the slot 53 or arbor 44 is a vertically extending lip 61 carrying a cam follower 62 in the form of a pin projecting into the groove 45. The motor 14 may either be electric or air, but as shown, I provide an air motor having an inlet line 63 and an outlet line 64, and the motor, as previously described, carries the laterally projecting shafts 13 on each end. Each shaft is adapted to receive a chuck 65 and 66 respectively, and while these chucks can take any desired form, I have shown the same as being adjustably secured to the threaded ends 67 of power shafts 13 by means of the nuts 68. Thus, any desired tool for dressing, grinding or polishing can be secured to either chuck and will obviously be rotated by the operation of the air motor 14.

I have illustrated in FIGURES 1 and 2 of the drawings, a grinding wheel 69, the shaft 70 of which is shown secured to the chuck 65 for rotation therewith. The grinding wheel 69 can be utilized to accomplish different operations, i.e., to grind and smooth the diametrical surface 71 of the doffer roll D, that is, the space between the rows of teeth, or it can be utilized to grind either side 72 or 73 respectively, of any given row of teeth T. The operation for grinding and dressing of any bent, hooked portions of the teeth T which protrude into the space 74 will now be described. First of all, the distance between the guides 35 and 36 is adjusted by loosening the Allen head screws 37' and placing the guides in respective portions of the space 74. The screws are then tightened and the guides can be moved together in the respective portions of the space 74 as the roll is rotated. Next the grinding wheel 69 by means of adjusting nut 68 is set to extend into the respective space between the rows of teeth as show in FIGURES 1 and 2 of the drawings. If the diametrical surface 71 of the space 74 is not to be ground (which usually it is not), then the height of the wheel is adjusted in relation to the guides 35 and 36 by rotating cap 42 to allow the tubular member 11 to be moved upwardly in relation to the bar 15 and the outer periphery of the grinding wheel will then slightly clear the bottom surface 71. If for some reason, the distance between the rows of teeth is such that the side 75 of the grinding wheel does not properly engage the surface 72 of the particular row of teeth to be dressed, then I may move the grinding wheel laterally by turning the nut 47 so that the arbor 44 will move upwardly in the direction of the arrow (FIGURE 1 adjacent reference numeral 68), thus causing the motor and grinding wheel to move laterally in the direction of the right side of the drawings. Thus, it is obvious that when the grinding wheel 69 is drawn toward the right side of the drawing to engage the inner surface 72 of a respective row of teeth T, the plate 16 and guides 35 and 36 tend to be urged in the direction of the left side of the drawings as indicated by the unmarked arrow adjacent the left hand guide 36. Actually, an effort is made to obtain a grinding wheel which will just fit snugly in the space 74 and engage both sides of adjacent rows of teeth. The lateral adjustment of grinding wheel 69 is then made to insure the proper alignment of the wheel with the space 74. The tool 10 can be held in different positions relative to the doffer roll D by gripping the handle 41. The doffer roll is then rotated in the direction of the arrows, FIG. 2 of the drawings, and the grinding wheel will rotate in the direction indicated by the arrow. Thus, any bent or hooked teeth protruding into the space 74 will be ground and dressed. The proper spacing of the guides and fine adjustment to the grinding wheel 69 will assure that each row is properly ground, as the guides ride in the helical space 74. It is also obvious that the grinding wheel can be utilized to grind any bent or hooked points protruding above the diametrical height of the roll. To accomplish this the wheel height is adjusted by rotating the cap 42 and its lateral spacing in relation to the guides can be had by rotating the knurled nut 47, and thus, by maintaining a consistent height all of the points of the teeth will be dressed to the same uniform height' This makes it possible to provide a close tolerance between the various rolls of the carding machine. It is also bovious that a similar grinding wheel could be placed in chuck 66, and simultaneously grind different rows of teeth, as the doffer roll is rotated. Further, a rotating wire brush or similar instrument can be placed in either chuck at a fixed height above the rows of teeth to bring the teeth of the wire to a high polish as is important to the proper operation of the carding machine.

Again, the importance of being able to adjust the height of the tool held in the chucks 65 and 66 in relation to the guides 35 and 36 should be stressed, as well as the fine lateral adjustment. While I have described the tool as being manually held in position it is also obvious that any type of mechanical support can be devised to stabilize the position of the tool and to keep the axis of the shaft 13 and grinder 69 parallel with the axis of the dotfer roll.

When the tool is manually held, stabilizing can be had by utilizing either an adjacent roll of the carding machine or a steel shaft (not shown) fastened in position a few inches above the surface of the roll, and against which the upright sleeves 21 and 22 can be adapted to rest.

While I have shown and described certain specific embodiments of my invention, it will be readily understood that these embodiments are merely for the purpose of illustration, and description, that various other forms may be devised, and that changes may be made in the proportion and minor details of construction, without departing from the spirit of the invention or scope of the appended claims.

I claim:

1. A machine for dressing, grinding and polishing a dotfer roll and the like of the type having upright hooked teeth defining a helical space therebetween, comprising a frame carrju'ng space parallel depending guides of a size and configuration to fit said helical space, a transversely extending power driven shaft carried by said frame, means on said shaft for securing a dressing, grinding and polishing tool to the outer termination thereof and for rotation therewith, said tool being secured in such a manner as to engage the teeth and ride in the space between the teeth, means associated with said frame for adjusting the height between said guides and said shaft, and means for adjusting the lateral distance between the guides and a tool secured to said shaft.

2. A machine as set forth in claim 1, wherein said means for adjusting the height between said guides and shaft includes a guide plate, an upright tubular post, a supporting bar slidably received in said post and means for adjustably sliding said bar in relation to said post.

3. A machine for dressing, grinding and polishing a dofier roll and the like having rows of upright hooked teeth defining grooves therebetween comprising a frame including, an upright vertically extending hollow tubular post, a pair of spaced parallel horizontally and transversely positioned beams secured to said post adjacent the lower end thereof, a supporting bar slidably received in said hollow tubular post and having portions extending above and beyond the upper and lower end terminations of said post, a transversely extending guide plate rigidly secured to the lower end of said supporting bar, the upper portion of said supporting bar being threaded, a cap rotatably carried at the upper end of said hollow tubular post having a correspondingly threaded central aperture receiving the threaded portion of said supporting bar, a motor having an outer casing carried by said lower horizontal beam, at power driven shaft extending transversely with said lower beam, means for securing a tool to either end of said shaft, said motor casing being adjustably secured to said lower beam for lateral movement in respect therewith, means for limiting the lateral adjustment of said motor casing, depending guides arranged in spaced parallel relation secured to said guide plate and one of said guides having means for initially adjusting the space between said guides, whereby said guides and a tool carried by said shaft may be adjusted laterally in relation to one another and whereby rotation of said cap will vary the height between the guides and said tool carried by said shaft.

4. A machine as set forth in claim 3, wherein the structure provided for lateral adjustment between said guides and a tool carried by said shaft includes an arbor carried by said post and movable vertically in relation thereto, a vertically and angularly extending guide slot in said arbor and a cam follower secured to said motor casing adjacent the arbor.

5. A machine as set forth in claim 3, wherein said supporting bar is provided with a handle at the upper end termination thereof and parallel vertically extending uprights between the upper and lower beams to manually support the machine in proper position relative to a doffer roll.

References Cited by the Applicant UNITED STATES PATENTS 11,731 10/85 Ashworth 51242 1,473,086 11/23 Davidson. 1,968,550 7/34 Barnes 51-49 2,575,212 11/51 Foster 51-179 LESTER M. SWINGLE, Primary Examiner. J. SPENCER OVERHOLSER, Examiner. 

1. A MACHINE FOR DRESSING, GRINDING AND POLISHING A DOFFER ROLL AND THE LIKE OF THE TYPE HAVING UPRIGHT HOOKED TEETH DEFINING A HELICAL SPACE THEREBETWEEN, COMPRISING A FRAME CARRYING SPACE PARALLEL DEPENDING GUIDES OF A SIZE AND CONFIGURATION TO FIT SAID HELICAL SPACE, A TRANSVERSELY EXTENDING POWER DRIVEN SHAFT CARRIED BY SAID FRAME, MEANS ON SAID SHAFT FOR SECURING A DRESSING, GRINDING AND POLISHING TOOL TO THE OUTER TERMINATION THEREOF AND FOR ROTATION THEREWITH, SAID TOOL BEING SECURED IN SUCH A MANNER AS TO ENGAGE THE TEETH AND RIDE IN TEH SPACE BETWEEN THE TEETH, MEANS ASSOCIATED WITH SAID FRAME FOR ADJUSTING THE HEIGHT BETWEEN SAID GUIDES AND SAID SHAFT, AND MEANS FOR ADJUSTING THE LATERAL DISTANCE BETWEEN THE GUIDES AND A TOOL SECURED TO SAID SHAFT. 